But veteran environmental campaigner Bob Brown, who was instrumental in the overturning of the Workplaces (Protection from Protestors) Act 2014, said people who "care about Tasmania's future environment, economy and employment prospects" would put the Liberals last at the March 3 poll.

In a move to boost the party's pro-forestry credentials in the lead-up to the election, Resources Minister Guy Barnett said the reworked legislation would "get the balance right, to support the right of workers and businesses as well as protecting the continued right to free speech and the right to protest".

"We believe that it is a fundamental right for Tasmanians to be able to go about their lawful work without the threat of protesters intentionally shutting down and harming Tasmanian businesses," Mr Barnett said today.

Mr Barnett said a re-elected Liberal Government under Premier Will Hodgman would "address the High Court's concerns by amending or replacing specific sections of the Act to ensure a less restrictive effect on the freedom of political communication".

The failed Act of 2014 put into place on-the-spot fines of $10,000 for individual protesters as well as jail time for second offences, and gave police the power to stop protests before they happened — but the court's decision rendered them useless.

The charges against Mr Brown were later dropped, but he persisted with the High Court challenge to the law, arguing they contravened the implied right of communication in the Australian constitution.

In October 2017, the High Court found in favour of Mr Brown by a six to one majority, ordering the Tasmanian Government to pay costs.

Brown takes aim at Hodgman over second attempt at laws

Today's announcement was blasted by Mr Brown, who described it as a "cowardly plan to jail Tasmanians who peacefully protest the destruction of Tasmania's ancient forests and wildlife ... featherbedding the big end of town at great pain to the community".

In a statement, Mr Brown said Mr Hodgman and his Government were "under the thumb of last-century exploiters".

"They plan to win the debate by jailing their opponents in the Tasmanian community. All the polls show most people want what is left of Tasmania's old growth forests protected," Mr Brown said.

"Hodgman is simply complying with the logging and mining companies and other exploiters of Tasmania's wild and scenic assets.

"They cannot win a public debate about further eroding the island's premier attraction — its natural environment."

Mr Brown, who previously served 19 days in Hobart's Risdon Prison following the infamous Franklin River Dam protests of 1982-83, said there were "more than adequate laws already in place to prevent harm to business or damage to property".

"This is about locking up citizens who care enough about Tasmania's wild and scenic beauty to go on-site and peacefully protest its destruction," he said, calling on the Liberals to "publish the laws before the election rather than flag them now and reveal their true nature post-election".

"The last time he [Mr Hodgman] tried this, he was found by the High Court to be acting illegally."